Excavating-machine.



No. 796,747. PATENTED AUG. 8, 1905.

w. MARSHALL.

EXGAVATING MACHINE.

APPLICATION FILED MAR. 7, 1904.

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PATENTED AUG. 8, 1905.

W. MARSHALL. EXCAVATING MACHINE. APPLICATION FILED MAR. 7, 1904.

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No 796,747. PATENTED AUG. 8, 1905.

W. MARSHALL.

EXCAVATING MACHINE.

APPLICATION FILED MAE. 7, 1904.

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PATENTED AUG. 8, 1905.

APPLICATION FILED MAR. 7, 1904.

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No. 796,747. PATENTED AUG. 8, 1905. W. MARSHALL.

EXCAVATING MACHINE.

APPLICATION FILED MAB. 7. 1904.

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/7/ ""Hllll" UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed March '7, 1904. Serial No. 196,963.

To all whom it may concern:

Be it known that I, WALLACE MARSHALL, of Lafayette, county of Tippecanoe, and State of Indiana, have invented a certain new and useful Excavating-Machine; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts.

The object of this invention is to improve the construction of ditching-machines of the type which excavate the dirt and discharge it at the rear of the machine. Such machine is used in building-sewers and the like, the sections of sewer-pipe being laid between the excavating-point and the point at which the dirt is discharged by the machine.

This machine runs on a track and over the ditch that is being excavated, and one fea ture of the invention consists in the making of the transporting means laterally extensible to accommodate the machine for use in excavating ditches of varying widths.

Another feature of the invention consists in means for moving the excavator either laterally or vertically, or both, and in moving the lower end of the excavator farther forward or the reverse, as desired.

Another feature of the invention consists in the construction of the conveyer and the means for supporting it so that it will sag centrally and hold the dirt.

The foregoing and the other features of the invention will be understood more fully from the accompanying drawings and the following description and claims.

Figure 1 in the drawings is a side elevation of the machine. Fig. 2 is a plan view thereof. Fig. 3 is a central vertical longitudinal section through the lower part of the machine and a trench under it, showing the machine at work. Fig. 4 is a side elevation of the propelling and driving mechanism, parts being broken away. Fig. 5 is a plan view of the same. Fig. 6 is a front elevation of the frame of the machine and the means for mounting and controlling the excavator.

Fig. 7 is a section lon itudinal of the machine and vertical on the ine 9 9 of Fig. 6, parts broken away. Fig. 8 is a plan view with parts in section on the line 10 of Fig. 6. Fig. 9 is a central horizontal section transversely of the machine through the means for supporting the machine at the front end, the same being shown contracted in width. Fi 10 is the same view of the parts, the whee s extended so as to run on a wider track. Fig. 11 is a central vertical section transversely of the machine of means at the rear end of the machine for supporting it on the track, the same being contracted for a narrow track. Fig. 12 shows the same expanded for a wide track. Fig. 13 is a side elevation of the supporting means at the rear end of the machine. Fig. 14 is a verticahsection of the same between the wheels. Fig. 15 is a section on line 27 27 of Fig. 12. Fig. 16 is asection, on an enlarged scale, on line 28 28 of Fig. 7, showing the friction-wheels and associated parts in plan view, parts being broken away.

The machine has ahorizontal frame 30, supported by the wheels 31 upon a track 32. The rails of the track are laid on each side of the ditch or trench to be excavated and upon the cross-ties 33. 34 represents the ground or bottomof the trench, as shown in Fig. 3. 35 represents sections of sewer or drain pipe, and 36 the dirt discharged into the trench at the rear of the machine for filling the trench. The ditch is excavated by means at the forward end of the machine. The sewer-pipe is laid under the machine, and the dirt is returned and filled into the trench at the rear end of the machine as the machine progresses.

The means for propelling the machine will first be considered. On the frame are a fur nace and boiler 40, which drive an engine 41, and from said engine power is transmitted to the driving-shaft 42, as seen in Figs. 4 and 5, which is mounted transversely of the machine. It has on it a clutch mechanism 43 for throwing a pinion 44 on said shaft into or out of engagement with a gear 45 on the counter-shaft 46. This counter-shaft carries a sprocket-wheel 47 and gears 48 and 49,which are loosely mounted on said shaft. The gear 49 meshes with a gear 50 on another countershaft 51. The gear 48 meshes with a large gear 52, and the sprocket-wheel 47 transmits power by the sprocket-chain 53 to a sprocketwheel 54. The Wheels 50, 52, and 53 are rigidly mounted on the shaft 51. Power is transmitted from the shaft 51 by a sprocketwheel 55, sprocket-chain 56, and sprocketwheel 57 to the axle 58 at the rear of the machine, on which the truck-wheels 31 are mounted.

The excavating mechanism will now be explained. It is mounted at the forward end of the machine. This has a vertical frame 7 0, braced from rearward movement by the braces 71 and 72. Upon the upper end of the frame a rod 73 carries a derrick 74, that is held from lateral movement by guys 75 and from forward movement by a' guy 76. The derrick inclines toward the front as it projects upward and. its load will thus tend to pull the top toward the front of the machine, so that no guy is needed to prevent rearward movement of the derrick. T he upper end of the derrick carries a pair of pulleys 77 and 78. On shafts 135 in a frame 79 near the upper end of the main vertical frame 70 a air of winding-drums 80 and 81. are mounted. A cable 82 runs from the drum 80 about the pulley 78 and to the pulley 83 on the outer end of the boom 84. Through said drum and cable the outer end of the boom is elevated or lowered. The boom is mounted at its inner end'on two bearings 85 integral with the posts 86 on the turn-table 87, that is mounted within the circular turn-table support 88 by means of a spindle 89. (See Fig. 7.) This mounting permits vertical and horizontal oscillation of the boom and excavating mechanism. The boom centrally between its ends carries an excavator-frame 90, said frame being pivotally mounted at its upper end in connection with the boom. At each end of said excavator-frame a pair of sprocket-wheels 91 are mounted on a short shaft 92. A series of buckets 93 are connected together by links 94 to form an endless conveyer.

The endless series of buckets are driven through the sprocket-wheels 91 and shaft 92 by means of the sprocket-wheels 91 seen in Fig. 1, which are mounted on the shaft 92, and through the sprocket-chain 103, running from the sprocket-wheel 104, as seen in Fig. 6. The latter wheel is mounted loosely on a shaft 105, extending horizontally through the posts 86 on the turn-table 87. Thewheel 104 is thrown into operative engagement with the shaft 105 by a clutch 106.

The shaft 105 is driven by the bevel-gear 107, pinion 108, vertical shaft 109, bevelgear on said shaft 109, pinion 111 on a shaft 112, and sprocket-Wheel 113, as seen in Fig. 6. The wheel 113 is driven by chain 114, (seen in Figs. 1, 2, and 3,) running from the sprocket-wheel 115 on a counter-shaft 116. (Seen in Fig. 5.) This counter-shaft is driven by gear 117 on said shaft and the gear 118 on engine-shaft 42.

Returning to Figs. 6 and 7, it is noticed that on the shaft 109, near the upper end, there is a gear 120, that meshes with another gear 121 on a vertical counter-shaft 122. Both shafts 109 and 122 have secured to their upper ends friction-wheels 123 and 124. To one side of said friction-wheels corresponding friction-wheels 1.25 and 126 are mounted on vertical shafts 127. These shafts are vertical and mounted in eccentric bearings 129, carried by a bracket 130, (seen in Fig. 7,) said eccentric bearings being oscillated by the levers 1.31, (seen in Fig. 6,) so as to move the lower ends of said shafts to bring the wheels 125 and 126 into and out of engagement with one or the other of the wheels 123 and 124. The upper ends of the shafts 127 are mounted rather loosely in boxes 132 on the frame 79, and they carry worms 133, adapted to engage worm-wheels 134 on horizontal shaft 135, that carry the drum 80, which is used, through the cable 82, to elevate or lower the outer end of the boom 84. With this mechanism by operating one of the levers 131 the outer end of the boom may be elevated or lowered. The other shaft 135 carries the drum 81, and from it a cable runs over the pulley 77 at the upper end of the derrick and over a pulley 141 at the outer end of the boom and a pulley 142, mounted on the outer ends of the arms 143, and is at 144 secured to the boom. The arms 143 are rigidly secured to the sides of the excavator-frame 90 about midway. There-- fore with the drum 81 and cable 140 the lower or excavating end of the excavator may be advanced forward or returned. toward the rear, and inasmuch oscillatory movement be slightly elevated or lowered to suit the work.

Under the upper and rearwardlyextend ing end of the excavator a hopper is located on the forward end of the frame of the machine with its bottom open. Under the bottom of the hopper the conveyer 151 operates to receive the dirt and move it to. the rear, as seen in Fig. 3.

The conveyer is supported in its rearward movement by the rollers 154 on the spindles 155 on the boxes 156 at the lower end of the frame-bars 157.

The conveyer is driven by the means shown in Fig. 3. There the drum 160 is driven by a sprocket-wheel 162 and a chain 163 from the wheel 164 on the shaft 165. This shaft is driven by a large gear 166, that meshes with a pinion 167 on the engineshaft. (See Fig. 5.)

To adapt the machine foruse on tracks and for trenches of varying widths, the trans porting-wheels 31 are mounted so as to be laterally extended, as shown in Figs. 9 and 13. The arrangement of the forward wheels is shown in Figs. '9 and 10. There the wheels 31. are mounted on spindles 170, that are secured to the side of the I-beams 171, that are slidably mounted in the long rectangular box or casing 172, secured stationary to the under side of the frame 30 of the machine.

There are two I-beams 171 mounted in said casing 172 and side by side, but not engaging each other. For the narrowtrack the wheels 31 are pushed in against the ends of the easing 172; for a wider track they are pulled outward, as shown in Fig. 10. The ends of the I-beams 171 are secured rigidly to the block 173 for strengthening the construction.

The supporting mechanism at the rear end of the machine is shown in Figs. 12 and 14. There a pair of the long rectangular boxes or casings 172 are secured to the under side of the frame 30 and transversely of said frame' Each of these casings 172 and a pair of I- beams 171 are mounted the same as at the front of the machine, so that there are two sets of Ibeams, as shown in Fig. 14, At each side of the machine there is a block 174, that is secured to one I-beam of each pair. One of said blocks 174 carries loosely a tubular axle 175, longitudinally slidable in the axle 58 and by means of hangers 177 secured to the casing 172 above. In the outer end of the tubular axle 175 a short spindle 178 has secured rigidly on it the wheel 31. In the other end of said axle 175 a long spindle 179 passes through the other block 174 and carries on its outer end the other wheel 31. The

long spindle 179 is splined in the tubular axle 175, and the said tubular axle 179 is splined in the main axle 58, so that the actuation of the sprocket-wheel 57 by the engine will cause the rotation of the wheels 31 on the track.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In an excavating-machine, a turn-table with a pair of posts thereon, a boom pivotally mounted on said posts at its lower end, means for elevating and lowering the outer end of the boom, a shaft through said posts, means for driving the shaft, sprocket-wheels secured on said shaft, an excavator-frame pivotally mounted on the boom, an endless series of buckets mounted on said frame, a sprocket-wheel on said frame for actuating the buckets, and a chain running from said sprocket-wheel to the sprocket-wheel on said shaft. 4

2; In an excavating-machine, a boom pivotally mounted at its lower end to the machine, an excavating-frame pivotally mounted on the boom between its ends, a pulley on said excavating-frame below its pivotal connection with the boom, pulleys on the outer end of the boom, pulleys mounted at an elevated position above the frame of the machine, a pair-of drums, a cable running from one drum over the pulleys above the frame to pulleys on the boom for elevating and lowering the boom, a cable running from the other drum about the pulley above the frame of the machine on the end of the boom, and a pulley at the end of the boom and the pulley on the excavating-frame, and means for operating said drums independently or simultaneously.

3. In an excavating-machine, an extensible axle, suitable transporting-wheels secured thereon, and means for transmitting power to said axle for propelling the machine.

4. In an excavating-machine, a tubular axle rotatably mounted beneath the frame of the machine, means for rotating said axle, a tube longitudinally slidable in said tubular axle, a spindle secured in one end of said tube, the said slidable parts being splined together, and truck-wheels secured on said spindle.

5. In an excavating-machine, a pair of hollow casings secured transversely of the machine beneath the frame, a pair of beams independent of each other and slidably mounted in each of said casings, a bearingblock at each side of the machine secured to one sliding beam of each pair, the two' blocks being secured to different beams, and truckwheels slidably mounted in said blocks.

6. In an excavating-machine, a pair of hollow casings secured transversely of the machine beneath the frame, a pair of beams independent of each other and slidably mounted in each of said casings, a bearing block at each side of the machine secured to one sliding beam of each pair, the two blocks being secured to different beams, a main tu bular axle between said bearing blocks, means connected with said casings for rotatably mounting said tubular axle, means for rotating said axle, a tube slidably mounted in said main tubular axle and extending at one end through one of said blocks, a spindle secured to the outer end of said tube, another spindle slidably mounted in the other end of said tube, said main tubular axle and the tube within the same and the spindle within said inner tube being splined, and truck-wheels mounted on said spindles.

In witness whereof I have hereunto affixed my signature in the presence of the witnesses herein named.

I/VALLAOE MARSHALL. Vvltnesses:

FRANK S. MOORE, E. O. MINToN. 

